CN102406498A - Suction button assembly for endoscope - Google Patents
Suction button assembly for endoscope Download PDFInfo
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- CN102406498A CN102406498A CN2011102827693A CN201110282769A CN102406498A CN 102406498 A CN102406498 A CN 102406498A CN 2011102827693 A CN2011102827693 A CN 2011102827693A CN 201110282769 A CN201110282769 A CN 201110282769A CN 102406498 A CN102406498 A CN 102406498A
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- plunger
- cylinder
- opening
- button assembly
- attraction
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00066—Proximal part of endoscope body, e.g. handles
- A61B1/00068—Valve switch arrangements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00119—Tubes or pipes in or with an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/267—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the respiratory tract, e.g. laryngoscopes, bronchoscopes
- A61B1/2676—Bronchoscopes
Abstract
The invention discloses a suction button assembly for an endoscope. The endoscope includes an operation unit, an elongated tube, a distal opening, a suction channel, and a discharge conduit. The suction button assembly has a valve structure for changing over between the discharge conduit and the suction channel for communication and shut-off. The suction button assembly includes a plunger, a first stem end, and a valve opening of the plunger. A cap device is coupled to the first stem end and to the first cylinder end of a cylinder housing in the operation unit, and around the first stem end. A first regulating device prevents the plunger from rotating in the cap device. A second regulating device prevents the cap device from rotating about an axis of the cylinder housing, to keep the valve opening aligned with a flow opening of a cylinder passage of the cylinder housing.
Description
Technical field
The present invention relates to a kind of attraction button assembly of endoscope.More specifically, the present invention relates to a kind of attraction button assembly of endoscope, wherein can accurately control from body cavity attraction fluid.
Background technology
Endoscope comprises operating unit and from the elongated tubular of said operating unit to remote extension.Said elongated tubular comprises attraction passage and distal openings.Said attraction passage extends vertically.Said distal openings is formed in the distal surface of elongated tubular, as the far-end that attracts passage.Attract button assembly to be comprised in the operating unit.Attracting the concrete example of passage is instrument channels, and it is used for pliers or other medical apparatus are penetrated and be used to supply with rinse water etc.Attracting the part of passage is the branch road of instrument channels, and is connected to the attraction button assembly.
Except attracting passage, be used for also being connected to the attraction button assembly towards the discharge tube of the attraction of negative pressure source.An example of negative pressure source is a suction pump.Attract button assembly when manually being pushed, discharge tube to be connected to the attraction passage, be used for attracting through distal openings by doctor or operator.Attract button assembly that discharge tube is broken off to interrupt said attraction operation, referring to JP-A2007-252589 from attracting passage.
In Figure 14 A and 14B, the known example of attraction button assembly 108 is illustrated and comprises cylinder shell 110, plunger 115 and block a shot 116.Said cylinder shell 110 is housed in the operating unit of endoscope.The distal openings of cylinder shell 110 is open in the outside of operating unit.The proximal openings of cylinder shell 110 is connected to and attracts path 10 9.Cylinder shell 110 has cylinder path 111 (cylinder hole) and cylinder opening 113.Plunger 115 slidably is housed in the cylinder path 111, and has the rod end of giving prominence to from cylinder opening 113 114.Block 116 ends with plunger 115 are connected to the end of cylinder shell 110, and along the direction bias voltage rod end 114 that makes progress.
The opening 118 that is used for negative pressure source forms with open medially at cylinder path 111.The discharge tube 117 that is used for negative pressure source is configured to be connected with opening 118.Plunger 115 comprises valve opening 119, input valve port 120 and flow channel 121.Input valve port 120 is open in its lower wall.Flow channel 121 extends between valve opening 119 and input valve port 120.
In Figure 14 A, attract the original state of button assembly 108 to be illustrated.Rod end 114 was freely before being pressed.The position of the valve opening 119 of plunger 115 is higher than opening 118 so that the outer surface of plunger 115 is closed opening 118.Discharge tube 117 breaks off with attracting path 10 9.
In Figure 14 B, the down state that attracts button assembly is shown.Rod end 114 pushes in the cylinder opening 113 with desired depth.Valve opening 119 is positioned at the front of opening 118, is used to attract path 10 9 to be communicated with discharge tube 119 through flow channel 121.Fluid through attracting path 10 9 to be drawn in the cylinder path 111 passes through flow channel 121 and valve opening 119, and it is outside to flow through discharge tube 117 arrival endoscopies to arrive opening 118.
If valve opening 119 is not relative with opening 118 around its axis rotation according to plunger 115, the fluidic flow passage between valve opening 119 and opening 118 is very narrow.This can cause the bigger solid particle in the fluid can not pass through said path.Therefore, JP-A 2009-045126 and JP-A 2007-190054 disclose said attraction button assembly and comprise plunger and be arranged to from the outstanding adjusting projection to prevent to rotate of plunger.Flow channel has inner surface and forms from the combination groove of inner surface retraction, is arranged to the longitudinal extension along plunger, is used for slidably holding the joint of regulating projection.So, can become to make lateral openings relative rotation adjusting between cylinder and the plunger with the opening that is used for negative pressure source.Can make the captivation maximization that attracts button assembly.In brief, can have bigger size through the solid particle of valve module.
Yet in the attraction button assembly of JP-A 2009-045126 and JP-A 2007-190054, the adjusting projection of plunger engages with the engaged groove of the inner surface of flow channel.Frictional resistance contacts with the inner surface of combination groove and produces through regulating projection when plunger moves in flow channel.Frictional resistance can be very big so that catastrophe failure appears in plunger, and for example, even block device bias voltage when plunger is not pressed, then plunger can not be back to its home position.
Summary of the invention
In view of above problem, one of the object of the invention is to provide a kind of attraction button assembly of endoscope, wherein can accurately control from body cavity to attract fluid.
In order to realize above-mentioned purpose of the present invention and other purpose and advantage; A kind of attraction button assembly of endoscope is provided; Attraction passage and discharge tube that said endoscope comprises operating unit, is inserted into the elongated pipeline section in the body cavity and is provided with operating unit; Wherein distal openings is formed on the far-end of elongated tubular, attracts passage to be arranged to extend to distal openings, and discharge tube is connected to negative pressure source.In attracting button assembly, the cylinder shell is arranged on the operating unit, and comprises cylinder path, valve composition surface and stream opening; Said cylinder path is formed and passes the cylinder shell; Said valve composition surface is arranged in the cylinder path, and the stream opening is formed in the wall of cylinder path, and the cylinder path has the first and second cylinder openings; The said first cylinder opening is connected to the attraction passage; The valve composition surface has tapering, and the internal diameter of valve composition surface reduces towards the second cylinder opening from the first cylinder opening gradually, and said discharge tube extends from the stream opening.Plunger is housed in the cylinder path with the mode of slip; And comprise rod end, valve head and flow channel; Said rod end is outstanding from the said second cylinder opening; Said valve head is movable to the valve composition surface to form contact and to shift out from said valve composition surface; Said flow channel is relative with the stream opening, and wherein said plunger is in the closed position when rod end is not pressed, and when rod end is pressed, is in the release position; Valve head contacts with the valve composition surface when plunger is in the closed position attracting forming blocking-up between passage and the discharge tube, and when plunger is in the release position, break away from the valve composition surface with the aligned flow channel cooperation of stream opening to be communicated with attracting to form between passage and the discharge tube.The block device is fixed in rod end and cylinder shell, is used to cover rod end.First adjusting device prevents that plunger from rotating in the block device.Second adjusting device prevents to block a shot device around the axis rotation of cylinder shell, keeps flow channel thus and flows opening and aim at.
Preferably, first adjusting device comprises the first adjusting part of utilizing plunger to form.The second adjusting part utilizes the block device to form, and is used for engaging with the first adjusting part.
Preferably, first regulates part is formed in the female in the plunger, and second to regulate part be to be arranged to inner surface from the block device towards the outstanding projection of female.
Preferably, said second adjusting device comprises the 3rd adjusting part of utilizing the cylinder hull shape to become.The 4th adjusting part utilizes the block device to form, and is used for engaging with the 3rd adjusting part.
Preferably, the said the 3rd regulates part is formed in the female in the cylinder shell, and the 4th to regulate part be to be arranged to inner surface from the block device towards the outstanding projection of female.
Preferably, the stream opening is formed in the valve composition surface, and when plunger was in the closed position, the stream opening was closed by valve head, and when plunger was in the release position, the stream opening was open when the separation of valve head.
Preferably, flow channel passes plunger and forms, and comprises the flow port that is formed on plunger end and in the cylinder path, opens.The valve opening is formed in the wall of plunger, and relative with the stream opening when plunger is in the release position.
Preferably, valve head is arranged on an end relative with rod end of plunger.Flow channel has the internal diameter that in valve head, increases towards flow port.
Preferably, the cylinder path also comprises the first cylinder path, and the said first cylinder channel setting is between the valve composition surface and the first cylinder opening and be connected to the attraction passage.The second cylinder channel setting has the internal diameter less than the first cylinder path between the valve composition surface and the second cylinder opening, be used for slidably being installed in rod end.
Preferably, the maximum outside diameter of valve head is less than the internal diameter of the first cylinder path.
In a preferred embodiment, the stream opening is arranged between the valve composition surface and the second cylinder opening.Flow channel is formed between valve head and the rod end, and keeps relative with the stream opening.
Preferably, valve head is arranged on an end place relative with rod end of plunger.Flow channel is the longitudinal cut portion (cutout) that forms linearly, with along the plunger longitudinal extension.The cylinder path is have an internal diameter cylindrical.
Preferably; In addition; In said cylinder shell, form the exhaust passage; Said discharge tube is arranged to extend in said exhaust passage, and said exhaust passage is open when said plunger is in said closed position, and said exhaust passage is closed by said block device when said plunger is in said release position.
Preferably; The exhaust passage is formed in the block device; And when plunger is in the closed position, between the second cylinder opening and plunger, form the gap, be used for exhaust port aerofluxus, and said gap is sealed by plunger when plunger is in the closed position through the block device.
Preferably, said block device is processed by elastomeric material and elastically deformable when plunger slides.
Preferably, said block device comprises the block top of dish type.The block lateral margin forms from the edge at block top outstanding along downward direction; Has the lower end that is fixed to the cylinder shell; Be used for when pressing force is applied on the plunger until the release position, compressing along downward direction; And when the pressing force to plunger is released, rely on its restoring force to extend, so that plunger is back to the closed position.
Preferably, further, last cylinder surfaces is arranged on the cylinder shell, and relative with the block device.Lower wall is arranged on below the block device, plunger when downward direction is slided by on cylinder surfaces hold, be used to prevent that its slip from exceeding a predetermined displacement amount.
Preferably, negative pressure source is a suction pump.
In another preferred embodiment, the attraction button assembly of the valve arrangement of endoscope comprises the cylinder shell.The cylinder path is formed and passes the cylinder shell.Plunger is housed in the cylinder path, and between release position and closed position, is slidably.Attract passage to form upstream to extend from the cylinder path with the cylinder shell.Discharge tube forms to extend downstream from the cylinder path with the cylinder shell.The stream opening is formed in the wall of cylinder path, and said discharge tube extends from the stream opening.Flow channel is formed in the plunger, is used for when plunger is in the release position, will attracting passage to be communicated with discharge tube through the stream opening.The block device is fixed in the upper end of plunger, is used to cover the plunger of cylinder shell top.First adjusting device prevents that plunger from rotating in the block device.Second adjusting device prevents to block a shot device around the axis rotation of cylinder shell, to keep flow channel and to flow opening and aim at.
Preferably, further, second opening is formed on the place, end of flow channel, and relative with first opening when plunger is in the release position.
Preferably, plunger comprises to be arranged to from the outstanding plunger rod of cylinder path, is used to pass the cylinder path along making progress and the downward direction slip.Valve pocket forms from the rod end of plunger rod and extends, and has flow channel, when downward direction is slided, is set at the release position at plunger rod, and plunger rod is set at the closed position when upwards direction is slided.
In a preferred embodiment, further, the valve composition surface is formed with the cylinder path with preset width.Valve head be arranged on the plunger with flow channel below; Shape is associated with the valve composition surface; Be used for when plunger is in the release position, opening the valve composition surface; Be communicated with between attraction passage and flow channel, to form, and be used for contact and shut off valve composition surface when plunger is in the closed position, to attract formation blocking-up between passage and the flow channel.
Preferably, flow channel is along the longitudinal extension of plunger, and slippage is to aim at first opening.
As a result, attract and to be accurately controlled, rotating on the plunger He on the cylinder shell with the device that prevents to block a shot because first and second adjusting devices can be cooperated from the fluid of body cavity.
Description of drawings
Above-mentioned purpose of the present invention and advantage will be more readily understood from the detailed description of following joint accompanying drawing, in the accompanying drawings:
Fig. 1 is the plane graph that endoscope is shown;
Fig. 2 is the vertical cross-section diagram that the attraction button assembly of said endoscope is shown;
Fig. 3 is the vertical cross-section diagram that is illustrated in the attraction button assembly when pushing;
Fig. 4 A is the vertical cross-section diagram that the cylinder shell is shown;
Fig. 4 B is the perspective view that the cylinder shell is shown;
Fig. 5 A is the perspective view that plunger is shown;
Fig. 5 B is the rear view that said plunger is shown;
Fig. 6 is the enlarged drawing that the vertical cross-section of slip valve pocket is shown;
Fig. 7 is the perspective view that the part disconnection of block device is shown;
Fig. 8 A is the vertical cross-section diagram that the closed state with said slip valve pocket is shown;
Fig. 8 B is the vertical cross-section diagram that the open state of pedestal opening is shown;
Fig. 9 A illustrates the vertical cross-section diagram that another preferably attracts button assembly;
Fig. 9 B is the vertical cross-section diagram that is illustrated in the amplification of the said attraction button assembly when being pressed;
Figure 10 is the vertical cross-section diagram that said attraction button assembly is shown;
Figure 11 is the perspective view that the cylinder shell is shown;
Figure 12 A is the perspective view that plunger is shown;
Figure 12 B is the rear view that plunger is shown;
Figure 13 A is the perspective view that the block device is shown;
Figure 13 B is the rear view that the block device is shown;
Figure 14 A is the vertical cross-section diagram that the attraction button assembly of known structure is shown;
Figure 14 B is the vertical cross-section diagram that the attraction button assembly of this known structure when pushing is shown.
The specific embodiment
In Fig. 1, endoscope 10 is bronchoscopes, comprises elongated tubular 11 or guiding tube, operating unit 12 and general cable 13.Elongated tubular 11 enters into the bronchus as body cavity.Operating unit 12 is arranged on the proximal end of elongated tubular 11.Employed endoscopic system comprises treatment facility (not shown) and light source (not shown).General cable 13 is connected to these equipment.
Except far-end instrument opening 15, also in the distal surface of elongated tubular 11, form the window (not shown), comprise imaging window and lighting window.The image read-out (not shown) is arranged on the back of imaging window.The Connectorized fiber optic cabling (not shown) is arranged to extend from lighting window.The holding wire and the light cable that are used for image read-out are configured to pass elongated tubular 11 and general cable 13 extensions, and are connected to treatment facility and light source.
In Fig. 2, the original state that is not pressed is shown.In Fig. 3, the state that has been pressed is shown.Attract button assembly 18 to comprise housing apparatus 24 or cylinder assembly, plunger 25 and block device 26.Housing apparatus 24 is connected to operating unit 12.Plunger 25 is housed in the housing apparatus 24.Block device 26 is connected to housing apparatus 24 with plunger 25 and with its covering.
Operating unit 12 has handle shell 28.Housing apparatus 24 comprises support set 29 or valve casing and cylinder shell 30 or valve guiding piece.Support set 29 is fixedly attached to a glove 28.Cylinder shell 30 is fixedly connected with support set 29.Notice that upside is called as outlet side or upside among the figure, downside is called as input side.
Support set 29 have handle shell of projecting to 28 the outside outfan and project to the input of the inside of handle shell 28.Support set 29 is fixedly attached to handle shell 28.Flow chamber 31 in support set 29 is along longitudinal extension.The valve port 32 that is used for attraction (following cylinder end) is formed on the input end of support set 29, is used for being connected with attracting passage 17.Flow chamber 31 is communicated with attracting passage 17 by means of valve port 32.The outfan of flow chamber 31 links to each other with cylinder shell 30.
The cover 34 that flows is the parts that are positioned at the input end of cylinder shell 30.The outfan of support set 29 links to each other with the cover 34 that flows, and it is concentric with flow chamber 31.Cylinder opening 35 is formed in the last cylinder end of cylinder shell 30 and forms, and makes that the upper end of plunger 25 is outstanding.Referring to Fig. 4 A and 4B.
In Fig. 4 A, cylinder shell 30 comprises the first cylinder path 40, the second cylinder path 41 (cylinder hole) and has the path 42 or the valve composition surface of conicity.The first cylinder path 40 is parallel to flow chamber 31 and extends, and is connected to attraction passage 17 by flow chamber 31.The second cylinder path 41 is arranged on upside, coaxially extends with the first cylinder path 40, and its width is less than the first cylinder path 40.The upper end of the second cylinder path 41 has cylinder opening 35.The path 42 that has tapering is formed with the diameter that reduces, and extends to the lower end of the second cylinder path 41 from the outfan of the first cylinder path 40.
In Fig. 4 B, valve port cover 44 is included in the cylinder shell 30, is positioned at path 42 next doors that have tapering, and links to each other with discharge tube 21.Valve port cover 44 is along extending perpendicular to each the direction among the path 40-42, and connects with discharge tube 21.Be used for the stream opening 45 of negative pressure source or pedestal opening formed and be positioned at valve port cover 44 at the inner surface of the path that has tapering 42 place, end.
In Fig. 2 and Fig. 3, but plunger 25 be housed in the cylinder shell 30 with the mode of longitudinal sliding motion, and push and non-pressed state under attracting to switch open and closed condition between passage 17 and the discharge tube 21 during operation.Plunger 25 is single integral pieces, comprises the valve pocket 53 of plunger rod 52 and slip valve pocket or band tapering.Plunger rod 52 is along the longitudinal extension of path 40-42.But plunger rod 52 is installed in the second cylinder path 41 with the mode of longitudinal sliding motion.The first rod end 52a of plunger rod 52 is outstanding from cylinder opening 35.
In Fig. 5 A and 5B, cap sealed groove 54 is formed in the periphery of the first rod end 52a annularly, is used for connection cover cap device 26.Adjusting surface 55 in the adjusting device of Fig. 5 B utilizes the first rod end 52a to form, and is configured to be higher than cap sealed groove 54, has flat chamfer shape, and prevents the accident rotation of plunger 25 in block device 26.Bearing surface 56 is arranged on the first rod end 52a, and is manually pushed to press.
The second rod end 52b place at plunger rod 52 is provided with slip valve pocket 53.Extend as the external taper surface of the said slip valve pocket 53 of valve head internal valve composition surface along the path that has tapering 42.Said slip valve pocket 53 passes the second cylinder path 41 and slides with the path that has tapering 42 when plunger rod 52 slides.
In Fig. 5 A and 5B, plunger 25 has valve opening 58, flow port 59 and flow channel 60.Valve opening 58 forms in the sidewall of plunger rod 52.Flow port 59 is open downwards in slip valve pocket 53.Flow channel 60 extends between valve opening 58 and flow port 59.When plunger 25 was in open state, valve opening 58 was open in the sidewall of the part relative with stream opening 45 of plunger rod 52.Flow channel 60 makes the fluid (for example body fluid and blended solid particle) in the flow port 59 flow towards valve opening 58 when plunger 25 is in open state.The diameter of flow channel 60 is constant in plunger rod 52, but in slip valve pocket 53, increases gradually towards flow port 59.
In Fig. 6, the maximum outside diameter d1 of slip valve pocket 53 is arranged to littler than the inner diameter d 2 of the first cylinder path 40.This prevents slip valve pocket 53 and the first cylinder path, 40 CONTACT WITH FRICTION when plunger 25 slides in cylinder shell 30.Notice that the diameter of plunger rod 52 is slightly less than the internal diameter of the second cylinder path 41, and by 41 guiding of the second cylinder path.
In Fig. 2 and 3, block device 26 is formed by elastomeric material (for example rubber and elastomer).Block device 26 comprises circular block top 62 or block head and block lateral margin 63.Said block top 62 is connected to the first rod end 52a.Block lateral margin 63 is connected to the far-end of cylinder shell 30.
In Fig. 7, pass through openings 65 is formed in the block top 62, is used to hold plunger 25 and gets into.Pass through openings 65 has holds depression 66 and closed hole 67 or entering hole.Hold in the upper surface that depression 66 is formed on block top 62, and the top that holds the first rod end 52a higher than cap sealed groove 54 gets into.The part with cap sealed groove 54 that closed hole 67 holds plunger rod 52 gets into.
Adjusting in adjusting device surface 69 forms through the sidewall that holds depression 66 put down chamfering, and with surperficial 55 fixed engagement of the adjusting of the first rod end 52a.This prevents plunger 25 rotation in block device 26.First ring or following hole wall 70 in block top 62 are limited 67 of closed holes, and are engaged in the cap sealed groove 54 of the first rod end 52a.So the first rod end 52a is connected to block top 62.
The upper end of block lateral margin 63 is concordant with block top 62.The annular ridge 71 or second annular are formed in the lower end of block lateral margin 63, and outstanding along inside direction.Annular ridge 71 is engaged in the sealed groove 39.So block device 26 is maintained on the cylinder shell 30.The matching surface 71a that is positioned at annular ridge 71 outsides is relative with end surfaces 30a.The part of the matching surface 71a relative with steam vent 47 is ramped surfaces 71b, its from end surfaces 30a along plunger 25 radially extend the distance that increases.
Flange holds depression 72 and in the upper wall of annular ridge 71, forms around opening, and engages with shroud flange 38.The inwall that pedestal locating surface 73 in the adjusting device utilizes flange to hold depression 72 forms, and has even shape, and regulates surperficial 38a fixed engagement with the block of shroud flange 38.This device 26 axis rotation that prevents to block a shot around cylinder shell 30.Also prevent that through block device 26 plunger 25 from rotating in cylinder shell 30 indirectly.Can, plunger 25 make valve opening 58 relative when being set at the release position with stream opening 45.
In Fig. 2 and Fig. 3, the restoring force of block device 26 with plunger 25 upwards bias voltage pass cylinder opening 35, so that plunger 25 is remained on closed condition.When the first rod end 52a was pressed in the cylinder opening 35, moved towards cylinder opening 35 at the block top 62 of block device 26.In response to this, in other words block lateral margin 63 strains, radially become greatly and along vertically diminish (being compressed) of plunger around said plunger 25.When attracting button assembly not to be pressed, block device 26 is owing to the restoring force of block lateral margin 63 is back to its original-shape.
When being pushed by distortion, the annular ridge 71 of block lateral margin 63 is pushed towards end surfaces 30a.So exhaust passage 50 is sealed with contacting of steam vent 47 through ramped surfaces 71b, referring to Fig. 3.When block lateral margin 63 when being back to its original-shape, ramped surfaces 71b away from steam vent 47 with 21 pairs of ambient atmospheres of discharge tube are open, referring to Fig. 2 through exposing exhaust passage 50.
The operation that attracts button assembly 18 is described now.In order to diagnose through endoscope, negative pressure source 20 always is used for attracting.In Fig. 8 A, the initial condition that attracts is shown.Plunger 25 is arranged to closed state and is pressed onto on the path 42 or valve composition surface of band tapering with the outer wall (valve head) with the band tapering of slip valve pocket 53 through block device 26.The outer wall of said slip valve pocket 53 closely contacts with the periphery of stream opening 45 or pedestal opening, because shape is suitable for contacting with the valve composition surface of the path 42 of being with tapering.
Because outer wall and inwall all are taper especially, so even there be position irregular of position or the form error or the plunger 25 of stream opening 45, one of outer wall section also can seal stream opening 45.Stream opening 45 can closely be sealed and certain space very close to each other.Can be through interrupting the attraction in the far-end instrument opening 15 attracting to form blocking-up between passage 17 and the discharge tube 21, in addition be not attached to sealing member (for example O shape circle) on the position of plunger 25 or stream opening 45 near locational situation under also can realize.
When plunger 25 was in the closed position, the ramped surfaces 71b and the steam vent 47 of block lateral margin 63 left, and leave clearance space.Exhaust passage 50 is open.So discharge tube 21 is open for atmosphere on every side.Even, stream opening 45 also can prevent that overload from appearring in negative pressure source 20 when being sealed by slip valve pocket 53.
In order to attract, bearing surface 56 is pressed, shown in Fig. 8 B.The first rod end 52a overcomes the elastic force of block device 26 and is pushed in the cylinder opening 35.The block lateral margin 63 of block device 26 produces strain to increase diameter and compression in vertical direction, so that block top 62 contacts with last cylinder surfaces 37a.Therefore, plunger 25 switches to open state from closed condition.53 skews of slip valve pocket are flowed opening 45 away from the internal valve composition surface of the path 42 of band tapering to open.
When block lateral margin 63 strains, exhaust passage 50 is closed with tight contact of steam vent 47 through ramped surfaces 71b.The negative pressure of the attraction in discharge tube 21 or power are owing to itself and separating of ambient atmosphere increase.
When stream opening 45 is opened, attract passage 17 to be connected, to attract fluids (for example body fluid, the blended solid particle of institute etc.) through far-end instrument opening 15 with discharge tube 21.Said fluid flows through and attracts passage 17, valve port 32 and flow chamber 31, and is sucked in the first cylinder path 40 of cylinder shell 30 (shown in arrow), and through flow channel 60 time, gets into stream opening 45.Fluid in the stream opening 45 gives off from endoscope 10 through the attraction of discharge tube 21.
When operator or doctor hoped to interrupt said attraction, he or she removed thumb or other finger to reach non-pressed state from bearing surface 56.Then, block lateral margin 63 recovers its original shape through restoring force, and top 62 moves up with plunger 25 blocking a shot.Plunger 25 is switched to closed condition from open state.Attract passage 17 to break off, shown in Fig. 8 A, to interrupt the attraction in the far-end instrument opening 15 from discharge tube 21.
Similarly, plunger 25 is configured to open state and is used for attracting through pushing, and is configured to closed condition and is used for interrupting attracting through reaching non-pressed state.When plunger 25 is in the open state, the relative rotation between plunger 25 and cylinder shell 30 is prevented by block device 26 indirectly.The valve opening 58 of plunger 25 is relative consistently with stream opening 45.This makes the flow channel width maximization that is used for fluid flow between valve opening 58 and the stream opening 45.Attraction through attracting button assembly 18 is the highest.
The maximum outside diameter d1 of slip valve pocket 53 is less than the inner diameter d 2 of the first cylinder path 40.Slip valve pocket 53 is compressed against in off position on the valve composition surface of cylinder path 42 of band tapering, but does not contact with the second cylinder path 41 with this valve composition surface at the state except that closed condition.Therefore, slip valve pocket 53 slides and does not contact with the path 42 and the second cylinder path 41 of band tapering.Can be suppressed at the generation of the contact resistance between the inwall of plunger 25 and cylinder shell 30, to prevent fault reliably.
Next describe of the present invention another and preferably attract button assembly 80 or blocked valve assembly.Although the attraction button assembly 18 of the foregoing description has the stream opening 45 of the path 42 of the band tapering that is arranged in cylinder shell 30, attract button assembly 80 to have near the higher stream opening of the path than the band tapering in the cylinder shell 30 cylinder opening 35.
In Fig. 9 A, 9B and 10, attract button assembly 80 to comprise housing apparatus 81 or cylinder assembly, plunger 82 and block device 83.Plunger 82 is housed in the housing apparatus 81.Block device 83 makes plunger 82 be connected with housing apparatus 81.The element that is similar to the foregoing description is represented by identical reference marker.
The stream opening 88 that is used for negative pressure source is open at cylinder path 86 places, and is communicated with discharge tube 21.Valve seat mouth 89 is open at the following cylinder end place of stream cover 87, and has the first path 87a or the valve composition surface of band tapering, and the alternate path 87b of band tapering.The diameter of the first path 87a of band tapering reduces towards cylinder opening 35 gradually.The diameter of alternate path 87b of band tapering increases towards cylinder opening 35 gradually, and will be connected to the input of cylinder path 86 with the outfan of the first path 87a of tapering.
In Figure 11, shroud flange 38 is arranged on the end of the cylinder sleeve 37 of cylinder shell 85 with the mode of the cylinder shell 30 that is similar to first embodiment.Block is regulated surperficial 38a and is formed with shroud flange 38.
In Fig. 9 A, 9B and Figure 10, plunger 82 is single molded integral pieces, comprises plunger rod 91, slip valve head 92 and pressure head 93.Plunger rod 91 is housed in the cylinder path 86, is columniform and is long vertically, and have the diameter littler than cylinder path 86.Slip valve head 92 is arranged on the following rod end (second) of plunger rod 91 and locates.Be provided with from the first rod end 91a of the outstanding plunger rod 91 of cylinder opening 35.Pressure head 93 is arranged on the first rod end 91a place.The shape of slip valve head 92 forms along the inwall of the first path 87a of band tapering extends.
In the plunger 82 of above-mentioned structure, slip valve head 92 is closed valve seat 89 when attracting button assembly to be in not pressed state making, and this is because slip valve head 92 contacts with the inwall of the first path 87a that is with tapering.Closed condition is defined as attracting to form blocking-up between passage 17 and the discharge tube 21, referring to Fig. 9 B.When the first rod end 52a of plunger 82 is pressed into cylinder opening 35 1 predetermined displacement amounts through pushing, slip valve head 92 away from the band tapering the first path 87a to open valve seat mouth 89.Open state is defined as attracting connection between passage 17 and the discharge tube 21, referring to Figure 10.Notice that said predetermined displacement amount is by owing to spacer ring 94 limits with the position that engaging of cylinder opening 35 causes further pushing.
In Figure 12 A and 12B, longitudinal cut portion 95 forms in plunger rod 91 and longitudinal extension.The flow channel 96 of linearity configuration is limited in 95 in longitudinal cut portion, and utilizes plunger rod 91 location.When plunger 82 was set open state for, the output channel of flow channel 96 surface 96a was relative with stream opening 88.The input channel of flow channel 96 surface 96b is positioned at from attracting passage 17 than on the nearer side of stream cover 87.Consider these, confirm the length of longitudinal cut portion 95 in advance.
Adjusting in adjusting device depression 97 forms through the periphery wall chamfering to pressure head 93, and device 83 rotations that prevent to block a shot.The sealed groove 98 of Fig. 9 and Figure 10 is limited between pressure head 93 and the spacer ring 94 annularly, and is used for connection cover cap device 83.
In Figure 13 A and 13B, the shape of block device 83 is similar to block device 26, and comprises circular lid crown portion 99 or block head and block lateral margin 100.Block top 99 is connected to pressure head 93.Block lateral margin 100 is arranged on around the block top 99 and the first rod end 91a, and is connected to the far-end of cylinder shell 85.
Holding depression 101 is formed in the block top 99 with closed hole 102 or entering hole.Hold depression 101 and hold pressure head 93 entering.Closed hole 102 holds the first rod end 91a and gets into.Adjusting in the adjusting device protruding 103 is outstanding from the inner surface that holds depression 101, and engages with the adjusting depression 97 of pressure head 93.The hole wall 104 or first ring are limited closed hole 102, and are engaged in the sealed groove 98 of the first rod end 91a.
Attract operating in this and describing of button assembly 80.In Fig. 9 A and 9B, the original state that does not have attraction is shown.Plunger 82 is arranged to closed condition by means of block device 83, is pressed in the outer wall with slip valve head 92 on the inwall or valve composition surface of the first path 87a that is with tapering.Closed valve seat mouth 89.The outer wall of slip valve head 92 has tapering, is used for carrying out suitable contacting with the inwall of band tapering of the first path 87a of band tapering.To be similar to the mode of first embodiment, valve seat mouth 89 can be closed reliably, and hermetically-sealed construction (for example O shape circle) is not attached to the inside of the first path 87a of the outside of plunger 82 or band tapering.Can be through the attraction in the far-end instrument opening 15 being interrupted attracting to form blocking-up between passage 17 and the discharge tube 21.
When plunger 82 is in closed condition, between the outer surface of plunger rod 91 and cylinder opening 35, form annular clearance space, be used to flow opening 88 and be communicated with the exhaust port 105 of block device 83.This is effectively for preventing that overload from appearring in negative pressure source 20, because discharge tube 21 is open for ambient atmosphere.
Shown in figure 10, bearing surface 93a is pressed, and is used for attracting operation.The first rod end 91a is pushed in the cylinder opening 35.The block lateral margin 100 of block device 83 by strain to get into the spacer ring 94 in the cylinder opening 35.So plunger 82 switches to open state from closed condition.Slip valve head 92 squints so that valve seat mouth 89 is opened away from the inwall of the first path 87a of band tapering.When cylinder opening 35 is spaced apart 94 on ring when closing, attraction negative pressure in discharge tube 21 or captivation are owing to itself and separating of ambient atmosphere increase.
When valve seat mouth 89 is opened, attract passage 17 to be communicated with discharge tube 21.After passing through the surperficial 96b of input channel, the fluid that aspirates through far-end instrument opening 15 flows through in attraction passage 17 and flow chamber 31 arrival longitudinal cut portions 95 and the cylinder path 86.Then, fluid gets into stream opening 88 through cylinder path 86 and longitudinal cut portion 95 time.Fluid in stream opening 88 passes through discharge tube 21, and attracts to be pumped to through discharge tube the outside of endoscope 10 by the outside.
When plunger 82 was arranged to open state, block device 83 prevented the axis rotation of plunger 82 around cylinder shell 85.Input channel in the plunger 82 surface 96b can be held with to flow opening 88 relative.This makes at valve seat mouth 89 and is used for the channel width maximization between the stream opening 88 of fluid flow.Being similar to first embodiment, is the highest through the attraction that attracts button assembly 80.
In order to interrupt attracting bearing surface 93a release from push.The restoring force of block lateral margin 100 makes plunger 82 slide into closed condition, interrupting through the attraction of far-end instrument opening 15.
Because plunger 82 is prevented from the rotation in the cylinder shell 85 indirectly, so needn't between plunger 82 and cylinder shell 85, increase anti-rotational structure.This CONTACT WITH FRICTION resistance occurs for the anti-rotational structure that when plunger 82 slides, prevents plunger 82 and cylinder shell 85 in cylinder shell 85 is effective.Therefore, plunger 82 can be back to closed condition reliably and not have fault.
In the above-described embodiments, regulate the rotation adjusting that surface 55 and adjusting depression 97 are used for plunger 25 and 82.Regulate surface 69 with regulate protruding 103 be used to block a shot device 26 and 83 rotation adjusting.Yet, can use any known structure that prevents that can be used in the rotation adjusting at plunger or block device place, and unrestricted.
In the above-described embodiments, said block is regulated surperficial 38a and is associated with cylinder shell 30 and 85 as adjustment structure.Pedestal locating surface 73 is associated with block device 26 and 83 as adjustment structure.Yet the type of adjustment structure of the present invention and layout are not limited to the purpose of the rotation adjusting between cylinder shell and block device.
In the above-described embodiments, the path 42 of band tapering forms the path as band tapering of the present invention with the first path 87a (or valve composition surface) of band tapering in cylinder shell 30 and 85.Yet the position and the shape of path of the present invention are not limited thereto.Can change the position and the shape of the valve element of plunger 25 and 82 according to the variation in the path of band tapering.
In the above-described embodiments, plunger 25 and 82 remains on closed condition through the lateral margin 63 of block device 26 and 83 and 100 restoring force.Yet, also can use other structure that plunger 25 and 82 is remained on closed condition, for example be arranged on block top 62,99 and cylinder shell 30, the coil compression springs that is used for biased piston 25,82 between 85.
In the above-described embodiments, support set 29 separates with 85 to constitute housing apparatus 24 and 81 with cylinder shell 30.Yet support set 29 can be integrally formed with cylinder shell 30 or 85 by means of the monoshell device.
In the above-described embodiments, have that to attract the endoscope 10 of button assembly 18 or 80 are bronchoscopes.Yet endoscope 10 of the present invention can be the endoscope of other type, for example colonoscope.
In addition, attraction button assembly of the present invention can be built into the outfan that has the input that is arranged on the flow path on the cross side and be arranged on the flow path on the downside, attracts passage 17 can be connected with opposite mode with discharge tube 21.
In above-mentioned block device, run through opening 65 and in block top 62, form, be used to hold plunger 25 and get into.Yet block top 62 can not have the opening of running through.Only central concave can form in the lower wall at block top 62, is used to hold the upper end entering of plunger 25.
Characteristic in the present invention can be combined with the various known structure of the association areas such as catheter that are combined with valve.
Although the present invention has carried out complete description through its preferred embodiment with reference to accompanying drawing, various changes and modification are obvious to those skilled in the art.Therefore, only if these changes and modification deviate from scope of the present invention, otherwise they will covered in the scope of the present invention.
Claims (19)
1. the attraction button assembly of an endoscope; Attraction passage and discharge tube that said endoscope comprises operating unit, is inserted into the elongated pipeline section in the body cavity and is provided with said operating unit; Wherein distal openings is formed in the far-end of said elongated tubular; Said attraction passage is arranged to extend to said distal openings, and said discharge tube is connected to negative pressure source, and said attraction button assembly comprises:
The cylinder shell, said cylinder shell is arranged on the operating unit, and comprises cylinder path, valve composition surface and stream opening; Said cylinder path passes said cylinder hull shape and becomes; Said valve composition surface is arranged in the said cylinder path, and said stream opening is formed in the wall of said cylinder path, and said cylinder path has the first and second cylinder openings; The said first cylinder opening is connected to said attraction passage; Said valve composition surface has tapering, and the internal diameter of valve composition surface reduces towards the said second cylinder opening from the said first cylinder opening, and said discharge tube extends from said stream opening;
Plunger; Said plunger is housed in the said cylinder path with the mode of slip; And comprise rod end, valve head and flow channel, and said rod end is outstanding from the said second cylinder opening, and said valve head is movable to said valve composition surface to form contact and to shift out from said valve composition surface; Said flow channel is relative with said stream opening; Wherein said plunger is in the closed position when said rod end is not pressed, and when said rod end is pressed, is in the release position, and said valve head contacts between said attraction passage and said discharge tube, to form blocking-up with said valve composition surface when said plunger is in said closed position; And when said plunger was in said release position, said valve head broke away from said valve composition surface, to be communicated with forming between said attraction passage and said discharge tube with the aligned said flow channel cooperation of said stream opening;
The block device is fixed in said rod end and said cylinder shell, is used to cover said rod end;
First adjusting device is used for preventing that said plunger from rotating at said block device;
Second adjusting device is used to prevent the axis rotation of said block device around said cylinder shell, keeps said flow channel to aim at said stream opening thus.
2. attraction button assembly according to claim 1, wherein, said first adjusting device comprises:
The first adjusting part of utilizing said plunger to form;
The second adjusting part of utilizing said block device to form is used for engaging with the said first adjusting part.
3. attraction button assembly according to claim 2, wherein, said first regulates part is formed in the female in the said plunger, and said second to regulate part be to be arranged to inner surface from said block device towards the outstanding projection of said female.
4. attraction button assembly according to claim 2, wherein, said second adjusting device comprises:
The 3rd adjusting part of utilizing said cylinder hull shape to become;
The 4th adjusting part of utilizing said block device to form is used for engaging with said the 3rd adjusting part.
5. attraction button assembly according to claim 4, wherein, the said the 3rd regulates part is formed in the female in the said cylinder shell, and the said the 4th to regulate part be to be arranged to inner surface from said block device towards the outstanding projection of said female.
6. attraction button assembly according to claim 4; Wherein, Said stream opening is formed in the said valve composition surface, and when said plunger was in said closed position, said stream opening was closed by said valve head; And when said plunger was in said release position, said stream opening was open when said valve head separates.
7. attraction button assembly according to claim 6, wherein, said flow channel passes said plunger and forms, and comprises:
Flow port is formed on the end of said plunger and opening in said cylinder path;
The valve opening is formed in the wall of said plunger, and relative with said stream opening when said plunger is in said release position.
8. attraction button assembly according to claim 7, wherein, said valve head is arranged on an end relative with said rod end of said plunger;
Said flow channel has the internal diameter that in said valve head, increases towards said flow port.
9. attraction button assembly according to claim 8, wherein, said cylinder path also comprises:
The first cylinder path, the said first cylinder channel setting are between said valve composition surface and the said first cylinder opening and be connected to said attraction passage;
The second cylinder path, the said second cylinder channel setting has the internal diameter less than the said first cylinder path between said valve composition surface and the said second cylinder opening, be used for slidably being installed in said rod end.
10. attraction button assembly according to claim 9, wherein, the maximum outside diameter of said valve head is less than the internal diameter of the said first cylinder path.
11. attraction button assembly according to claim 4, wherein, said stream opening is arranged between said valve composition surface and the said second cylinder opening;
Said flow channel is formed between said valve head and the said rod end, and maintenance is relative with said stream opening.
12. attraction button assembly according to claim 11, wherein, said valve head is arranged on an end place relative with said rod end of said plunger;
Said flow channel is the longitudinal cut portion that forms linearly with along the plunger longitudinal extension;
Said cylinder path is have an internal diameter cylindrical.
13. attraction button assembly according to claim 4; Also comprise the exhaust passage; Said exhaust passage is formed in the said cylinder shell, is arranged to extend to said discharge tube, and said exhaust passage is open when said plunger is in said closed position; Be used to carry out the aerofluxus of said discharge tube, and said exhaust passage is closed by said block device when said plunger is in said release position.
14. attraction button assembly according to claim 4; Wherein, Said exhaust port is formed in the said block device; And when said plunger is in said release position, between said second cylinder opening and said plunger, form the gap, be used for said exhaust port aerofluxus, and said gap is sealed by said plunger when said plunger is in said closed position through said block device.
15. attraction button assembly according to claim 4, wherein, said block device is processed by elastomeric material and elastically deformable when said plunger slides.
16. attraction button assembly according to claim 15, wherein, said block device comprises:
The block top of dish type; With
The block lateral margin; Form from the edge at said block top and stretch out downwards; Has the lower end that is fixed to said cylinder shell; Be used for when pressing force is applied on the said plunger until said release position along said downward direction compression, and when said plunger discharges said pressing force, relying on its restoring force to extend, so that said plunger is back to said closed position.
17. attraction button assembly according to claim 15 also comprises:
Last cylinder surfaces is arranged on the said cylinder shell, and relative with said block device;
Lower wall is arranged on below the said block device, when said plunger rod slides along said downward direction, is held by cylinder surfaces on said, is used to prevent that its slip from exceeding a predetermined displacement amount.
18. attraction button assembly according to claim 4, wherein, said negative pressure source is a suction pump.
19. an attraction button assembly that is used for the valve arrangement of endoscope comprises:
The cylinder shell;
The cylinder path passes the cylinder hull shape;
Plunger is housed in the said cylinder path, and between release position and closed position, is slidably;
The attraction passage that utilizes said cylinder hull shape to become is to extend from said cylinder path upstream direction;
The discharge tube that utilizes said cylinder hull shape to become is to extend from said cylinder path downstream;
The stream opening is formed in the wall of said cylinder path, and said discharge tube extends from said stream opening;
Flow channel is formed in the said plunger, is used for when said plunger is in said release position, through said stream opening said attraction passage being communicated with said discharge tube;
The block device is fixed in the upper end of said plunger, is used to cover the said plunger of said cylinder shell top;
First adjusting device is used for preventing that said plunger from rotating at said block device;
Second adjusting device is used to prevent the axis rotation of said block device around said cylinder shell, aims at said stream opening to keep said flow channel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010211859A JP5409570B2 (en) | 2010-09-22 | 2010-09-22 | Endoscope suction button |
| JP2010-211859 | 2010-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102406498A true CN102406498A (en) | 2012-04-11 |
| CN102406498B CN102406498B (en) | 2015-03-04 |
Family
ID=45818390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110282769.3A Expired - Fee Related CN102406498B (en) | 2010-09-22 | 2011-09-21 | Suction button assembly for endoscope |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120071844A1 (en) |
| JP (1) | JP5409570B2 (en) |
| CN (1) | CN102406498B (en) |
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| US9161680B2 (en) | 2013-11-26 | 2015-10-20 | Bracco Diagnostics Inc. | Disposable air/water valve for an endoscopic device |
| CN109414157A (en) * | 2016-06-29 | 2019-03-01 | 奥林巴斯株式会社 | Endoscope-use button |
| CN110251050A (en) * | 2019-06-24 | 2019-09-20 | 珠海视新医用科技有限公司 | A kind of attraction seat and the endoscope including the attraction seat |
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| GB2538535B (en) * | 2015-05-20 | 2020-02-26 | Keymed Medical & Ind Equipment Ltd | Endoscope valve |
| CN113425225A (en) * | 2015-11-24 | 2021-09-24 | 安多卓思公司 | Disposable air/water and suction valve for endoscope |
| DE102020129208A1 (en) | 2020-11-05 | 2022-05-05 | Ambu A/S | Endoscope with a suction valve with sealing button |
| WO2023283658A1 (en) * | 2021-07-09 | 2023-01-12 | Grumpy Innovation, Inc. | Diverter and/or aerosolization preventer |
| GB202110898D0 (en) * | 2021-07-29 | 2021-09-15 | Ga Health Medical Devices Limitied | A suction valve for an endoscope |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5409570B2 (en) | 2014-02-05 |
| CN102406498B (en) | 2015-03-04 |
| JP2012065767A (en) | 2012-04-05 |
| US20120071844A1 (en) | 2012-03-22 |
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